Note: Black and Silver will be sent Randomly. Product functional description: Low noise, low vibration, can get speed up to 38KM/H Kickstart, no battery required to start Carburetor included for better engine performance With rubber hose for connecting fuel tank and carburetor Specifications: Material: heavy metal Color: Black and Silver in random order Quantity: 1 kit Engine type: Single cylinder, air-cooled, 2-stroke petrol engine Tank capacity: 2L Gear ratio: 18:1 Compression ratio: 6:1 Lubricating oil: 2-stroke machine oil (or 10W/40,10W/30 machine oil) Mixing ratio of fuel and engine oil: 16:1 for new sets, 20:1 after 500KM Fuel consumption: 4L / 100km Fuel Type: 90 Type of coupling: rub block drying Maximum speed: 38km/h Maximum power: 2.2kW / 6000r / min (5-6HP / 6000r / min) CDI ignition, sprocket shifting Spark plug: Z4C 14mm Suitable for: mountain bikes, racing bikes, cruisers, choppers with V-frames A notice: Necessary mounting brackets, gaskets, hardware included Please check carefully if your bike has enough space to install this motor kit. Random delivery in black and silver If you need the electronic English manual, we can email you. Please do not hesitate to contact us, thank you. Package includes: 1 x 80cc 2-stroke engine 1 x Back Tear Gas Canister (2L) 1 x carburetor 1 x CDI ignition system 1 X Throttle Cable 1 X Throttle Handlebar Set 1 X standard bicycle chain 2 X 9-hole clamp blocks 1 x fuel tap 1 X chain guard 1 X Chrome Muffler 1 x 44T Zinc Plated Sprocket 1 X Drive Chain Idler Pulley 1 X Press clutch lever 1 X Apark Connector